For the record

• In our item linking the return of bedbug infestations with sales of second-hand goods (5 October, p 10), we incorrectly described Ian Burgess as the director of the Medical Entomology Centre of the University of Cambridge. In fact, he is director of a Cambridge-based company called Insect Research & Development Ltd, which originated in the now-defunct entomology centre. He also points out that bedbugs usually take up to a fortnight to digest their meals, not the six months mentioned.

• The photograph of "the cactus that kills hunger pangs for Kalahari hunters" (21 September, p8) is not a cactus but a cactiform.

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